Subaru Legacy/Outback

1999-2003 of release

Repair and operation of the car



Subaru of Legasi, Autbek
+ Cars Subaru Legacy, Outback
+ Operation manual
+ Routine maintenance
+ Engine
+ Cooling systems, heating
- Power supply system and release
   Specifications
   + System of injection of fuel
   - Control systems of the engine and decrease in toxicity of the fulfilled gases
      ESM - check of serviceability of a state and replacement
      Diagnostics of malfunctions - the general information and preliminary checks
      System of onboard self-diagnostics (OBD) - the general information
      Application of an oscillograph for supervision of working parameters of a control system
      Removal and installation of components of systems of decrease in toxicity of the fulfilled gases
   + System of production of the fulfilled gases
+ Electric equipment of the engine
+ Manual box and differential
+ Automatic transmission
+ Coupling
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment









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Control systems of the engine and decrease in toxicity of the fulfilled gases

General information

Function chart of control systems of engine/decrease in toxicity of the fulfilled gases (the l models 2.0 and 2.5 equipped with system of diagnostics of OBD II)

1 — Model of engine management (ECM)
2 — the ignition Module
3 — the Sensor of provision of a cranked shaft (CKP)
4 — the Sensor of provision of a camshaft (CMP)
5 — the Sensor of provision of a butterfly valve (TPS)
6 — Fuel injectors
7 — pressure Regulator
8 — the Sensor of temperature of cooling liquid of the engine (ECM)
9 — the Sensor of temperature and pressure of the soaked-up air
10 — the Electromagnetic valve of stabilization of turns of idling (IAC)
11 — the Electromagnetic valve of management of a purge of a coal adsorber
12 — the Fuel pump
13 — the Valve of system of ventilation of a case (PCV)
14 — the Air filter
15 — the Coal adsorber of system of catching of fuel evaporations (EVAP)
16 — the Main relay
17 — the Relay of the fuel pump
18 — the Fuel filter
19 — the Forward catalytic converter
20 — the Back catalytic converter

21 — the cooling system Fan
22 — the cooling system fan Relay
23 — the Sensor of atmospheric pressure
24 — the Sensor of a detonation (KS)
25 — Dokatalitichesky a lambda probe
26 — Post-catalytic a lambda probe
27 — the Electromagnetic valve of admixture of air in injectors
28 — the Compressor of the air conditioning system (To/in)
29 — the Sensor switch of permission of start (only models with AT)
30 — the Sensor switch of neutral provision of transmission (only models with RKPP)
31 — the Control lamp of refusals (MIL/" check the engine")
32 — the Tachometer
33 — the K/V Relay
34 — the Module of management To/in
35 — the ignition Switch
36 — the Module of management of transmission (TCM) (only models with AT)
37 — the Sensor of speed of the movement of the car (VSS)
38 — the Diagnostic socket of the line of data (DLC)
39 — the fuel cut-off Valve
40 — the Double-thread valve


Function chart of control systems of engine/decrease in toxicity of the fulfilled gases (the l models 2.0 and 2.5 equipped with OBD Subaru)

 Interpretation of abbreviations see on the previous illustration


1 — ECM
2 — the ignition Module
3 — the CMP Sensor
4 — the CKP Sensor
5 — TPS
6 — Fuel injectors
7 — pressure Regulator
8 — the ECT Sensor
9 — the fuel cut-off Valve
10 — the Sensor of temperature and pressure of the soaked-up air
11 — GUR pressure Sensor switch
12 — the Electromagnetic IAC valve
13 — the Electromagnetic valve of management of a purge of a coal adsorber
14 — the Fuel pump
15 — the PCV Valve
16 — the Air filter
17 — the Coal adsorber of EVAP
18 — the Main relay
19 — the Relay of the fuel pump
20 — the Fuel filter

21 — the cooling system Fan
22 — the cooling system fan Relay
23 — KS
24 — the K/V Compressor
25 — the Sensor switch of permission of start (only models with AT)
26 — the Sensor switch of neutral provision of transmission (only models with RKPP)
27 — the Control lamp of MIL/" check the engine"
28 — the Tachometer
29 — the K/V Relay
30 — the Module of management To/in
31 — the ignition Switch
32 — VSS
33 — DLC
34 — the GUR liquid pressure Sensor switch
35 — the Double-thread valve
36 — the Lambda probe (models with the catalytic converter)
37 — the Forward catalytic converter (at the corresponding complete set)
38 — the Back catalytic converter (at the corresponding complete set)
39 — SO Converter (only models of the main complete set)
40 — TCM (only models with AT)


Function chart of control systems of engine/decrease in toxicity of the fulfilled gases (model of 3.0 l)

1 — ECM
2 — the ignition Module
3 — the CKP Sensor
4 — the CMP Sensor
5 — TPS
6 — Fuel injectors
7 — pressure Regulator
8 — the ECT Sensor
9 — the Sensor of temperature of the soaked-up air (IAT)
10 — pressure Sensor in the inlet pipeline (MAP)
11 — the Electromagnetic IAC valve
12 — the Electromagnetic valve of management of a purge of a coal adsorber
13 — the Fuel pump
14 — the PCV Valve
15 — the Air filter
16 — the Coal adsorber of EVAP
17 — the Main relay
18 — the Relay of the fuel pump
19 — the Fuel filter
20 — the Left forward catalytic converter
21 — the Right forward catalytic converter
22 — the Back catalytic converter
23 — the cooling system Fan
24 — the cooling system fan Relay
25 — the Left KS

26 — the Right KS
27 — Left dokataliticheskiya a lambda probe
28 — Right dokataliticheskiya a lambda probe
29 — Post-catalytic a lambda probe
30 — the K/V Compressor
31 — the Sensor switch of permission of start
32 — the Control lamp of MIL/" check the engine"
33 — the Tachometer
34 — the K/V Relay
35 — the Module of management To/in
36 — the ignition Switch
37 — VSS
38 — DLC
39 — TCM
40 — the fuel reserve Sensor
41 — the Double-thread valve
42 — the fuel cut-off Valve
43 — the Induction valve of system of admixture of air
44 — the Control valve
45 — the Operating electromagnetic valve of system of admixture of air
46 — the Vacuum tank
47 — the Valve of system of recirculation of the fulfilled gases (EGR)
48 — the Fuel damper
49 — the Sensor of atmospheric pressure


Monitoring of composition of air and fuel mix

1 — the Forward catalytic converter
2 — the Fulfilled gases
3 — Dokatalitichesky a lambda probe
4 — the Fuel injector
5 — the Combustion chamber
6 — ECM
And — the Signal of increase in duration of opening of an injector

In — the Signal of reduction of duration of opening of an injector
With — the High level of the content of oxygen in the fulfilled gases
D — the Low level of the content of oxygen in the fulfilled gases
E — the Signal to the regrown poor mix
F — the Signal to the reenriched mix


 More detailed information on control systems of the engine and decrease in toxicity of the fulfilled gases of your car can be received in representative office or at firm car repair shop Subaru.


For the purpose of decrease in level of issue in the atmosphere of the toxic components getting to composition of the fulfilled engine gases as a result of evaporation and incompleteness of combustion of fuel and also for maintenance of efficiency of return of the engine and decrease in fuel consumption, the cars considered in the present manual are equipped a number of special systems which can be united under the general name of control systems of the engine and decrease in toxicity of the fulfilled gases. The complete set of systems depends on year of release of models and the region, on whose market the car is delivered. Full information on type and structure of systems is given in the information label of VECI fixed under a cowl.

 The scheme of laying of hoses can be provided on separate Schild. The principle of functioning of control systems of engine/decrease in toxicity of the fulfilled gases is presented on illustrations.


It is necessary to carry the following to number of the systems concerning management of operation of the engine and control of toxicity of the fulfilled gases (depending on a complete set):

a) System of ignition (see the Head Elektrooborudovaniye of the engine);
b) System of catching of fuel evaporations (EVAP);
c) System of recirculation of the fulfilled gases (EGR) (model of 3.0 l);
d) System of the operated ventilation of a case (PCV);
e) Catalytic converter(s);
f) The conductor of a jellied mouth of a fuel tank (under the filling gun of columns of pouring of unleaded gasoline);
g) System of onboard diagnostics (OBD).

Functioning of all transferred systems, anyway, directly or indirectly, is connected with management of decrease in toxicity of the fulfilled gases. In the Sections given below the general descriptions of the principles of functioning of each of systems are given, and also procedures of diagnostic checks and recovery repair (if that is obviously possible) separate components which performance lies within qualification of the average amateur mechanic are stated

Before coming to conclusion about refusal of toxicity, any of systems of decrease, attentively check serviceability of functioning of power supply systems and ignition. Diagnostics of some of knots of systems of decrease in toxicity demands use of the special difficult equipment in application and a certain qualification of the performer, and therefore, its performance will be reasonable to be charged to professional mechanics of specialized car repair shop. Told above does not mean that service and repair of components of systems of decrease in toxicity in practice are represented exigeant. It is necessary to remember that one of the most common causes of refusals is elementary violation of quality of connections of vacuum or electric lines, and therefore, first of all it is always necessary to check a condition of the corresponding electric and nipple sockets. The owner of the car can independently and it is rather easy to make a number of checks, and also, to execute a set of procedures of routine maintenance of the majority of components of systems in house conditions, using thus a usual set of the adjusting and metalwork tool.

 Do not forget about additional federal guarantee certificates under which components of systems of decrease in toxicity and management of operation of the engine get. Before starting performance of any procedures for repair of knots and details of data of systems, consult about conditions of observance of these obligations in representative office of the Subaru company.


Try to observe everything the precautionary measures stipulated in the following Sections when performing service of electronic components of the considered systems. It is necessary to notice that illustrative material can not always correspond in accuracy to real placement of components on the car. Such discrepancies are connected with continuously happening process of modification within a standard design of each model.

Control system of the engine

Module of management (ECM)

General information

ECM represents the electronic module on the basis of the microprocessor which on the basis of the analysis of the signals arriving from various information sensors exercises control of functioning of systems of injection, ignitions and decrease in toxicity of the fulfilled gases.

The tasks which are carried out by ECM are among:

a) Management of fuel injection parameters;
b) Management of ignition parameters;
c) Management of functioning of system of stabilization of turns of idling (IAC);
d) Management of functioning of EVAP system;
e) Management of functioning of the fan of the cooling system;
f) Management of functioning of the fuel pump;
g) Management of functioning of EGR system (model of 3.0 l);
h) Self-diagnostics;
i) Activation of emergency parameters of the failed subsystems.

When ECM develops output signals of the fixed level without the signals arriving from a lambda probe(s) say that the control system functions in the mode of "an open contour", i.e., without feedback. If the module starts processing information issued by the oxygen sensor(s), the mode becomes "closed" that allows ECM to correct parameters of injection and ignition taking into account the current operational characteristics of the engine (turns, loading, temperature, and so forth).

In memory of the module emergency values (values by default) the main working parameters of all subsystems of management are put. These parameters are activated in case of identification of refusal of the corresponding subsystem, providing adequacy of functioning of the engine (with inevitable loss of efficiency of return).

Refusal of any subject to monitoring from the block of self-diagnostics of a component is fixed in memory of the module in the form of the corresponding five-digit code (DTC) which reading can be made by means of the special scanner (see the Section System of Onboard Self-diagnostics (OBD) - the general information).

Supply of fuel and configuration of air and fuel mix

Tracing and analyzing the data arriving from the corresponding information sensors, ECM determines necessary parameters of supply of fuel (quantity and the moments of injection). The module exercises continuous consecutive control of injection under any service conditions of the engine, except the warming up moments at start.

The amount of the fuel injected into the engine is defined by duration of opening of needle valves of injectors.

The moment of injection is calculated taking into account maximum efficiency of air supply in each of engine cylinders (fuel is injected just before the moment of the beginning of opening of the inlet valve).

Injection duration

During warming up of the engine at start duration of opening of injectors is defined by the ECM sensor according to change of temperature of cooling liquid. After the engine gets warm up to the normal working temperature, the following scheme of determination of duration of injection joins: "Basic value x Adjustment parameters + Variable of compensation of change of level of tension". Thus basic value of duration of opening of an injector is defined by two major factors: amount of the air given to the engine (on pressure sensor signals in the pipeline) and the current frequency of rotation of the engine (on CKP sensor signals). Adjustment parameters are considered below. The compensation variable is urged to compensate the temporary delays of operation of injectors connected with battery tension variations.

The organization of the listed below adjustments allows to correct in due time basic value of duration of opening of injectors for the purpose of maintenance of optimum quality of air and fuel mix at any parameters of functioning of the engine.

· Correction of composition of air and fuel mix on signals dokatalitichesky a lambda probe. On the models equipped with the catalytic converter the lambda probe which is given out dokatalitichesky information on the level of the content in the fulfilled gases of oxygen allows ECM to correct in due time a dosage of supply of fuel for the purpose of prevention of noticeable deviations of quality of gas mixture from stekhiometrichesky value;
· Starting correction of composition of mix. At the time of a provorachivaniye of a cranked shaft at start duration of opening of injectors forcibly increases for the purpose of maintenance of stability of turns of the engine;
· Correction of composition of mix during warming up of the engine. This adjustment (the temperature of cooling liquid is lower, the injection duration is more) is carried out on the basis of the data issued by the ECT sensor and ECM for stabilization of turns of the engine is used during its warming up;
· Post-starting adjustment. This adjustment allows to stabilize engine turns at the moment directly after implementation of its start (also information on temperature of cooling liquid delivered by the ECT sensor is considered);
· Correction of composition of mix at full opening of a butterfly valve. At full opening of a butterfly valve duration of time of opening of injectors increases according to information arriving from TPS and the sensor of pressure in the inlet pipeline;
· Correction of composition of mix during acceleration. This adjustment is urged to compensate a temporary delay of definition of amount of the soaked-up air for the purpose of increase of sensitivity of the engine on manipulation with a gas pedal during acceleration.

On the considered models correction of composition of air and fuel mix on signals dokatalitichesky the lambda probe is organized intellectually. The essence of the told is concluded in the following: during management of composition of the mix ECM on the basis of the analysis of information arriving from the oxygen sensor calculates the correcting variable which then is added to put in memory of the processor (corresponding to the current turns of the engine) to basic value of duration of time of opening of injectors, thus sensitivity and reactivity of system of subjects is lower, than the size of the demanded temporary additive is more noticeable. The intellectual organization of process allows to bypass this situation due to continuous correction of basic value by addition to it the last correcting additive and preservation of total value in random access memory of the processor, thus, the size of the next adjustment is significantly reduced, and efficiency of functioning of system increases.

Ignition of gas mixture

The scheme of management of ignition parameters on l models 2.0 and 2.5

1 — Number of the cylinder
2 — the Impulse of an angle of rotation of a cranked shaft (before VMT)
3 — the Impulse of an angle of rotation of a camshaft (after VMT)
4 — Installation of a corner of an advancing of ignition at start of the engine

5 — an ignition advancing Corner during the normal operation of the engine
6 — mix Combustion
7 — porosity Installation
8 — Ignition

The scheme of management of ignition parameters on models of 3.0 l

1 — Number of the cylinder (VMT)
2 — the Impulse of an angle of rotation of a cranked shaft (before VMT)

3 — the Impulse of an angle of rotation of a camshaft (after VMT)
4 — Installation of a corner of an advancing of ignition at start of the engine


ECM continuously traces the current working condition of the engine on the signals arriving from sensors of pressure, temperature of cooling liquid, temperature of the soaked-up air of provision of a cranked shaft and so forth. On the basis of the analysis of the received information of ECM selects optimum (from put in memory of the processor) the ignition moment at which gives out a signal of interruption of primary contour on the ignition module.

 

At management of ignition intellectual function (function of fast recognition) in which the data which are written down in memory by ECM are compared to information arriving from information sensors and sensors switches is also used. So, at an ignition moment choice for any operating conditions of the ECM engine processes information on the output power of the power unit, fuel consumption, composition of the fulfilled gases and so forth. During start of the engine fluctuations of its turns in view of what the module of management is not capable to control adequately an ignition advancing corner therefore for this period the corner is forcibly exposed on 10 ° before VMT on a special signal "10 °" the CKP sensor always take place.

After implementation of start of the ECM engine in the range of signals of CKP between 97 ° and 65 °otslezhivat the current turns of the engine and on the basis of the analysis of the received information exposes a corner of an advancing and porosity of an impulse of ignition corresponding to the current requirements of the engine.

Management of idling turns

ECM provides stability of turns of idling of the engine by activation of the lamellar electromagnetic IAC valve of the additional air operating a perepuskaniye bypassing the throttle case. As initial information of ECM uses these provisions of a cranked shaft (CKP), temperature of cooling liquid (ECT), pressure, and also the sensor switch of activation of the conditioner of air delivered by sensors that allows to exercise complete control of engine turns at any current loading. As the operating element of the IAC valve the electromagnet reacting to the level of porosity of the operating periodic signal is used. The some of filling of the signal which is given out by the module of management on an electromagnet, the big extent of opening of the rotary gate is provided by the last. The consumption of additional air is directly proportional to extent of opening of the gate and has direct impact on the frequency of rotation of the engine.

 

The main objectives of the device is compensation of increase of load of the engine at activation To/in or other power-intensive consumer of the electric power, increase of turns of idling of the engine in an initial stage of its warming up, ensuring buffer effect at fast closing of a butterfly valve, and also increase of stability of turns of the engine idling.

Management of functioning of the fuel pump

Being guided by information delivered by the sensor of provision of a camshaft (CMP), ECM provides management functioning of the fuel pump by inclusion/switching off of its relay. For the purpose of increase of level of safety the fuel pump is automatically blocked at spontaneous stops of the engine at the included ignition. The principle of the organization of management is formulated in the table given above.

Systems of decrease in toxicity of the fulfilled gases

System of ventilation of a case (PCV)

The principle of functioning of system of ventilation of a case (PCV) on the example of the 6-cylinder engine

1 — the Air chamber
2 — the throttle Case
3 — the Connecting hose
4 — the PCV Valve
5 — the Cover of the right head of cylinders
6 — an engine Case
7 — the Cover of the left head of cylinders

8 — the Spring
9 — the Valve
And — To the inlet pipeline
In — Karterny gases

The PCV system serves for decrease in issue in the atmosphere of hydrocarbonic connections at the expense of a conclusion from the engine of karterny gases.

The PCV valve, hermetically closed cover of a jellied mouth of motive oil, air inlet and set of connecting vacuum hoses are among the main components of system.

At incomplete opening of a butterfly valve, the karterny gases containing in the engine, on a special hose via the PCV valve are taken away in the inlet pipeline due to relevancy of depth of the depression created in it. At the same time in an engine case on the hose connected to a cover of a head of cylinders fresh air is started.

At completely open gate when depth in the inlet pipeline is not really great, the part of karterny gases on a separate hose is transported to an inlet air path and further - to the throttle case.

 Over time walls of the case of a throttle start becoming covered by tarry deposits, in particular around an arrangement of a butterfly valve. In view of told, it is necessary to make cleaning of the case of a throttle from time to time.

Three-functional catalytic converter (TWC)

 The catalytic converter can not be included in the standard package of models 2.0 and 2.5 of the l equipped with OBD Subaru.

The catalytic converter(s) is a component of systems of decrease in toxicity of the fulfilled gases, is switched on in structure of system of release and serves for decrease in issue in the atmosphere of toxic components. There are two types of catalytic converters. The ordinary oxidizing converter allows to lower the content in the fulfilled gases of hydrocarbons (NANOSECOND) and carbon monoxide (WITH). The three-functional catalytic converter (TWC) in addition allows to reduce emission of nitrogen oxides (NOH). On all models considered in the present manual three-functional catalytic converters are used.

Basic components of the catalyst are platinum (Pt), rhodium (Rh) and a palladium (Pd), which mix a thin layer is applied on the cellular design, or a porous ceramic basis having an oval form.

 In order to avoid an irreversible exit of the catalyst out of operation for gas station of the models equipped with the catalytic converter it is necessary to use exclusively unleaded fuel!

Maximum efficiency of functioning of the catalyst is reached at a certain concentration in the fulfilled gases of toxic components. The demanded balance is reached due to control of composition of air and fuel mix which the control system tries to support constantly near the value equal to stekhiometrichesky number, - see the following subsection.

Control system of quality of air and fuel mix

 On models 2.0 and 2.5 of the l equipped with OBD Subaru, this system is installed only complete with the catalytic converter.

The system on the basis of the signals which are continuously arriving dokatalitichesky a lambda probe(s) makes the corresponding corrections of basic value of duration of opening of injectors for the purpose of maintenance of quality of air and fuel mix near the stekhiometrichesky value (14.7 parts of air on 1 part of fuel) providing optimum conditions for functioning of the three-functional catalytic converter (TWC).

 Various basic values of time of opening of injectors are provided for various turns of the engine, the current loadings and amount of the soaked-up air.

The intellectual correction of the current basic values allowing to increase considerably reactivity of responses to the happening changes is also provided in system.

Control system of ignition

Control of functioning of system of ignition is exercised also by ECM, being guided by the data arriving from various information sensors and sensors switches. The scheme of functioning of a control system of ignition of various engines is submitted on illustrations.

Scheme of functioning of a control system of ignition of the 4-cylinder engine

1 — the Battery
2 — the ignition Switch
3 — ECM
4 — the Sensor of provision of a camshaft (CMP)
5 — the Sensor of a detonation (KS)

6 — the Sensor of temperature and pressure of the soaked-up air
7 — the Sensor of temperature of cooling liquid (ECT)
8 — the Spark plug
9 — the ignition Module
10 — the Sensor of provision of a cranked shaft (CKP)


Scheme of functioning of a control system of ignition of the 6-cylinder engine

1 — ECM
2 — the Coil of ignition of the 1st cylinder
3 — the Coil of ignition of the 3rd cylinder
4 — the Coil of ignition of the 5th cylinder
5 — the CMP Sensor
6 — pressure Sensor
7 — the Sensor of temperature of the soaked-up air (IAT)
8 — the CKP Sensor

9 — the Sensor of provision of a butterfly valve (TPS)
10 — the Coil of ignition of the 6th cylinder
11 — the Coil of ignition of the 4th cylinder
12 — the Coil of ignition of the 2nd cylinder
13 — the ECT Sensor
14 — the Left KS
15 — the Right KS

Principle of functioning of EGR system

1 — the EGR Valve
2 — ECM
3 — the Inlet pipeline

4 — Final port
5 — the Left head of cylinders


The scheme of functioning of system of catching of fuel evaporations (EVAP) on l models 2.0 and 2.5 (on models of 3.0 l the scheme is organized similarly)

1 — the Inlet pipeline
2 — the throttle Case
3 — the Electromagnetic valve of management of an adsorber purge
4 — ECM

5 — the Coal adsorber
6 — the Fuel tank
7 — the fuel cut-off Valve (the locking valve)
8 — the Double-thread valve

On the basis of the analysis of the arriving information of ECM calculates optimum values of a corner of an advancing and porosity of the operating ignition impulses for any current working parameters of the engine. In the work of ECM uses the program card of management on the closed contour providing magnificent reactivity of responses to any changes of the entering data.

System of recirculation of the fulfilled gases (EGR) - only models of 3.0 l

The system of recirculation of the fulfilled gases (EGR) serves for minimization of emission in the atmosphere of nitrogen oxides (NOX). The solution of an objective is reached by decrease in temperature of combustion of gas mixture due to admixture to it a certain amount of the fulfilled engine gases. On appropriately equipped models the contour of recirculation of the fulfilled gases operated by ECM in the inlet pipeline is organized.

System of catching of fuel evaporations (EVAP)


General information

The EVAP system accumulates the evaporations accumulating in a fuel path during the parking of the car and provides a conclusion them to the inlet highway for burning in the course of normal functioning of the engine, preventing thereby pollution of the atmosphere in petrol couples. Improvement of system is made continuously in process of toughening of requirements imposed to environment protection.

The adsorber filled with absorbent carbon, the electromagnetic valve of management of an adsorber purge, the fuel cut-off valve (the locking valve), the double-thread valve and connecting lines are a part of system.

The fuel evaporations accumulating in a tank are removed in a coal adsorber on vaporizing lines. The locking valve is built in fuel lines.

Control of functioning of the valve of a purge of an adsorber is exercised by ECM, choosing the most optimum moment for a purge, proceeding from working parameters of the engine, and also information delivered by sensors of temperature and fuel consumption.

The electromagnetic valve of management of pressure is switched on in the vaporizing line of a fuel tank and serves for control of pressure/depression in a tank on the basis of the signals which are given out on ECM by pressure sensor installed in a tank.

Fuel cut-off valve (locking valve)

Design of the locking fuel valve

1 — To a coal adsorber
In — the Valve is open

With — the Valve is closed


Design of the safety valve (And) cover of a jellied mouth of a fuel tank

1 — the Sealant
2 — the Spring

3 — the Valve


Design of the coal adsorber used on models with OBD II

1 — the Filter
2 — Absorbent carbon
3 — the Spring
And — To the electromagnetic valve of management of a purge

In — From a fuel tank
With — Air


Design of the coal adsorber used on l models 2.0 and 2.5 with OBD Subaru

1 — the Filter
2 — Absorbent carbon
And — To the electromagnetic valve of management of a purge

In — From a fuel tank
With — Air


Design of the electromagnetic valve of a purge of an adsorber on l models 2.0 and 2.5

1 — To an adsorber

In — To the inlet pipeline / case of a throttle


Design of the electromagnetic valve of a purge of an adsorber on models of 3.0 l

1 — To an adsorber

In — To the throttle case


Design of the double-thread valve installed on models with OBD II

1 — the Valve
And — Atmospheric pressure

In — To a coal adsorber
With — From a fuel tank


Design of the double-thread valve installed on models with OBD Subaru (l models 2.0 and 2.5)

1 — the Valve
2 — the Case
3 — the Cover
4 — pressure Valve

5 — the Spring
And — To a coal adsorber
In — From a fuel tank

The locking valve is built in directly a vaporizing tube of a cover of a fuel tank. Rise in level of fuel in a tank leads to locking of an opening in a cover, leaving it the only exit through a vaporizing tube in a coal adsorber.

Cover of a jellied mouth of a fuel tank

The safety valve which is built in a cover of a jellied mouth serves for prevention of education in a tank of excessively deep depression owing to violation of passability of vaporizing lines.

In normal conditions the cover closes a mouth absolutely hermetically due to the rubber consolidation pressed on all perimeter of a mouth and also thanks to that the valve (And) remains densely pressed by a spring to the saddle.

At increase of depth of depression in a tank atmospheric pressure wrings out a spring down that leads to opening of the valve. As a result pressure is leveled because in a tank external air gets.

Coal adsorber

The coal adsorber is filled with absorbent carbon and serves for temporary accumulation of fuel evaporations and is blown on ECM signal when opening the special electromagnetic valve (see below). From an adsorber fuel evaporations come to the inlet pipeline then are burned in the course of normal functioning of the engine. The design of a coal adsorber is presented on illustrations.

Electromagnetic valve of management of a purge of a coal adsorber

The valve is switched on in the vaporizing line connecting an adsorber to the inlet pipeline (l models 2.0 and 2.5 with OBD II) / the throttle case (models of 2.0 l and 2.5 from OBD Subaru and model of 3.0 l) and located from the lower party of the pipeline. Control of a purge is exercised by ECM, being guided by data on the current operational parameters (temperature of cooling liquid, engine turns, movement speed, etc.). The purge is made at the started engine, except for certain conditions, such, for example, as work on single turns. The design of the valve is shown on illustrations.

Double-thread valve

The double-thread valve is switched on in the vaporizing line connecting a coal adsorber to a fuel tank. The design of the valve is shown on illustrations. When pressure in a tank exceeds some established value developed by a spring effort is overcome and the valve opens, thus being in a tank under pressure of evaporation are taken away in an adsorber where accumulate in a filler time.

When lowering pressure the valve is closed, however the air getting into system through entrance port of an adsorber continues to get into a tank through a small opening in a valve end face, preventing formation of excessive depression.

Vacuum path

The scheme of laying of vacuum lines is submitted on illustrations.

 The detailed scheme of laying of vacuum lines is submitted on a label of VECI of each car, - in case of different interpretations the preference should be given information of VECI.


The scheme of laying of vacuum lines on models 2.0 and 2.5 of the l equipped with system of onboard diagnostics of OBD II

1 — pressure Regulator
2 — the throttle Case
3 — the Electromagnetic valve of management of an adsorber purge
4 — the Electromagnetic valve of admixture of air to injectors
And — Hoses

In — Tubes
With — To a coal adsorber
D — the Direction forward on the car


The scheme of laying of vacuum lines on models 2.0 and 2.5 of the l equipped with OBD Subaru

1 — pressure Regulator
2 — the throttle Case
3 — the Electromagnetic valve of management of an adsorber purge
And — Hoses

In — Tubes
With — To a coal adsorber
D — the Direction forward on the car


The scheme of laying of vacuum lines on models of 3.0 l (OBD II)

1 — the throttle Case
2 — pressure Regulator
3 — the Induction valve of system of admixture of air
4 — the Electromagnetic valve of management of an adsorber purge
5 — the Control valve

6 — the Operating electromagnetic valve of system of admixture of air
And — Hoses
B — Tubes
With — To a fuel tank